Now Nasa is sending a couple of the headsets up to the International Space Station for the resident astronauts to use.

But far from just playing virtual Minecraft in space, the agency says it would have real benefits. It would allow the astronauts to broadcast a first-person viewpoint in real time - meaning Nasa could easily help with engineering or other important work.

Back on Earth, operators would be able to make notes directly in the astronaut's field of view.

The latest must-have gadget in space

Another feature will allow Nasa to put animated holographic drawings over whatever the crew member is looking at.

The two HoloLens headsets will be sent up this weekend as part of a SpaceX resupply mission.